1. Department of Physics University of Konstanz 78457 Konstanz Germany
2. Institute of Nanoscience and Nanotechnology National Center for Scientific Research “Demokritos” 15341 Agia Paraskevi Attica Greece
3. Department of Chemistry Quaid-i-Azam University Islamabad 45320 Pakistan
4. Department of Chemistry University of Wah 47040 Wah Pakistan
5. School of Engineering and Materials Research Institute Queen Mary University of London Mile End Road London E1 4NS UK
6. Helmholtz-Zentrum Berlin für Materialien und Energie Kekuléstraße 5 12489 Berlin Germany
7. Faculty of Engineering, Environment and Computing Coventry University Priory Street Coventry CV1 5FB UK
8. Department of Physics Swansea University Vivian Tower, Singleton Park SA2 8PP Swansea UK
9. Department of Chemical, Materials and Production Engineering University of Naples Federico II Piazzale Tecchio 80 80125 Fuorigrotta Italy
10. State Key Laboratory of Photocatalysis on Energy and Environment Institute of Advanced Energy Materials Fuzhou University Fuzhou Fujian 350002 China
11. Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne (EPFL) Rue de l'Industrie 17 CH-1951 Sion Switzerland